- 行业: Earth science
- Number of terms: 93452
- Number of blossaries: 0
- Company Profile:
Founded in 1941, the American Congress on Surveying and Mapping (ACSM) is an international association representing the interests of professionals in surveying, mapping and communicating spatial data relating to the Earth's surface. Today, ACSM's members include more than 7,000 surveyors, ...
A plane angle such that exactly four rotations in the plane, initial side to former position of terminal side, about the vertex bring the angle back to its original position. Its measure is therefore exactly 1/4 that of a full circle Π/2 radians, 90°, or 100 gons.
Industry:Earth science
(1) A coastal indentation which encloses an area greater than that inclosed by a semi-circle whose diameter is a line drawn between the extremities of the indentation.
(2) A bay indirectly connected with the sea through a narrow pass.
Industry:Earth science
The ratio of the total amount of radiation (power) reflected or scattered by a body to the total amount of radiation (power) incident on the body. In practice, albedo is measured and calculated only for the observable portion of a body. For example, the albedo of the Moon is calculated for the visible face only. The albedo of the Moon is 0. 07, the albedo of the Earth is 0. 39, the albedo of Jupiter is 0. 51. The different albedos of different parts of a region can affect the accuracy of measurements made on photographs of that region or the ability to interpret the photograph correctly.
Industry:Earth science
A bearing of approximately 90° or 270° with respect to the longitudinal axis of a vehicle.
Industry:Earth science
The adjustment made to measured values to refer them to the value established at the base station.
Industry:Earth science
Noise from sources other than the source of the desired signal.
Industry:Earth science
The union of such things as have been holden parcel of the realty but which are not actually annexed, fixed or fastened to the freehold.
Industry:Earth science
The theoretical part of positional astronomy, concerned with the techniques for determining directions to celestial bodies. Its mathematical basis is spherical trigonometry.
Industry:Earth science
The adjustment of the horizontal coordinates, or of the horizontal distances and angles or directions, in a geodetic network.
Industry:Earth science
(1) A prolongation of the line passing through the nodal point of a lens system. (2) The line connecting the centers of curvature of all the surfaces in a lens system. (3) The line perpendicular to all surfaces of a centered lens system.
Industry:Earth science
